Furnace.



Patented Apr. 22. |902.

I vW. STUBBLEB'INE.

FU R N AGE.

(Application led Aug'. 22, 1901.)

(No Model.)

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FURNAGE.

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(Application filed Aug. 22, 1901.)

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' NIrnD STATES WILLIAM STBBLEBINE, or BETI-ILEI-IEM, PENNSYLVANIA.

FURNACE.

'SPECIFICATION forming'part of Letters 4Eatent No. 698,336, dated April 22,1902.

imitation nea August 22,1901. 'sean No. 72,950. (No man.)

To -a/Z'Z whom, it 1v1/ty concern:

Beit known that I, WILLIAM STUBBLEBINE,

a citizen of the United States, residing at Bethlehem, in the countyof. Northampton and'State of Pennsylvania, have'invented certain new and useful Improvements in 'Furmetallurgical furnaces,more particularly that class using gaseous fuel, and is especially applicable to puddlin g, crucible, and open-hearth furnaces, also for heating boilers.

It aims to effect more nearlyrthe complete or perfect combustionof the'fuel-than-has heretofore been possible. It seeks to setv in motion or operation synchronously a hot-air blast or blasts and the gases arisingfromthe fuel in combustion and after combining orV commingling the same deliver'saidcommingled air and gases adjacently to the grate-V compartment into the working compartment. Thus is induced an increased current ordraft upon the products of combustion, augmenting the action thereof inthe Working chamber or compartment.

It furtherfprovides for theautomatic discharge or delivery of the ash or residue from the grate or grates, also to provide conditions conducive or favorable to longevity of the life of the grate-bars, and to otherwise promote utility and convenience.

It also provides for the advantageous ap'- plication of the air-blast to the ash pit or chamber to more equally distribute said blast through the ashes aud over or among the:

grate-bars, thus avoiding theclinkering of I the grate and throwing `dirt into the`working chamber or compartment of the furnace or boiler, resulting inv creating a lvery intense heat, unaccompanied with any dirt whatever, as is generally the case with grates as heretofore used,

Itv further provides for facilitating or expediting the removal of the ashes or residue from the ash pit or chamber Withoutv requiring the opening of doors, dac., and for effecting such removal from each sideof said chamber.

blastpipes suitably adapted to' be connected to an air-blast supply and means for taking .the gaseous combustion products from the v.The invention consists ofay series ,of.air-

grate or lire-chamber and delivering the commingledlor combined gas and air at a common point or pointsadjacently to said grate or `nrechamber into the working compartment or chamber, 'all substantially' as hereinafter morefully disclosed, and particularly pointed out by the claims.

In the accompanying drawings, illustrating the preferred embodiment Yof my invention, Figure l is a vertical transverse section thereof. Fig. 2 is a vertical longitudinal section taken on the line x x of Fig. 1. Fig. 3 is a horizontal section taken on the line y y of Fig. l. Fig. 4 is a section taken on the line z z of Fig. 1. Fig. 5 is a section taken on the line w w of'Fig. l. morefully disclosing the means for removing the ashes.'

Latitudeis allowed herein as to details, as

ythey may be changed or varied at will with- `bottomfportionwith an ash-chamber 2 to receive the ashesor residue from the fuel, preferably water-sealed, or which may be used with or without a water seal, as desired. Directly above said chamber and forming the Fig. 6 is adetailed view bottom of the lire or combustion chamber are also have their lower ends'extending straight down into and resting upon the bottom of the ash pit or chamber below the water seal;V The supporting-bars 4b are preferably connected by a series of cross pieces or bars 4". Saidv grate-bars may be made from square or iiat steel or iron bars. When made of fiat bars, however, they are to be bent, as in giving the same characteristic structure of the grate ICO chamber 2, one delivering the air-blast under each grate-section above the water seal and in a direction from the higher edge toward the lower edge of each grate-section. By this arrangement it will be observed that the airblast is applied to more equally distribute the same through the individual grate-bars, thus avoiding the clinkering of the grate and throwing dirt into the working chamber of the furnace or boiler. The eect of this is to create a very intense heat, unattended with any dirt whatever, as is generally experienced in the use of this class of grates as heretofore constructed.

The combustion and ash-pit chambers are provided with the usual doors or openings through which access may be readily had thereto.

Arranged below the bottom of the ash chamber or pit, in alinement with an opening therein extending the length thereof, is a device or means for mechanically effecting the removal of the ashes or residue, comprising a shaft 3b, suitably journaled in position and equipped with a right-hand spiral or screw blade or conveyer' 3C and a left-hand spiral or screw blade or conveyer 3, arranged upon the opposite sides of about the transverse center of said shaft. Said shaft is also provided at one end with a pulley 3, which may be belted to a suitable motor or machinery for actuating said shaft in operating the device. This device, it will be observed, provides for the removal of the ashes, duc., from the ash-chamber at opposite sides thereof and Without the interposition of the hand to effect such removal.

Arranged in a lateral or side wall of the combustion-chamber and an end wall thereof are series of vertical pipes 5 5 5H-say three inches in diameter-through which are passed air-blasts finally delivered or discharged adjacently to the fire or grate compartment into the working compartment of said chamber, as presently described. Said pipes are suitably incased within tubular bricks or casings 5 5, respectively. The end wall series of said pipes 5 51I at their lower ends connect with a iiue or pipe G, extending in the plane both of the end wall and of one side wall of the grate or fire chamber or compartment, the lateral arm of said flue or pipe connecting with one of two lateral pipes Gn, arranged in the side or lateral walls of said chamber,

ceases connecting with val ved vertical, &c., air-blast supply-pipes S.

The upper ends of the pipes 'connect with one arm of a horizontal pipe 7, also lying in the plane of one end wall and of one side wall and opening into the combustion-chamber at 5X. The upper ends of the pipes 5II connect with short pipes 9, opening into the combustion-chamber, as at 7.

The lateral wall-pipes 5 connect at their lower ends with the other of the lateral pipes GL and connect at their upper ends laterally with a horizontal pipe 5, opening into the opposite side of the combustion-chamber, as at 5V.

Passages or conduits 3 in the end wall and passages 3' in the lateral walls have communication with the combustion-chamber to rcceive the gases therefrom through the ports 3m bb", produced in the walls of said chamber. The gases entering the conduits or passages 3 Via the ports 3b after passing therethrough enter and pass through the passages 3f 3, containing the pipes 5k 7, and back into the combustion-chamber at 5X The gases entering the conduits 3k via the ports 3W after passing therethrough pass back into the combustion-chamber at 7'", thus providing for the heating of the air-blasts and their commingling with the gases at the points of delivery thereof into the combustion-chamber. This, as will be seen, has the effect to induce increased or augmented draft or suction-eurrents in the combustion-chamber to provide for effecting more nearly complete or perfect combustion than heretofore possible, which of course will increase the efficiency and producing capacity of the furnace or boiler.

Suitable means are provided for feeding or supplying, preferably by power, the fuel or coal to the furnace, which may comprise a hopper 13, delivering into a trough or chute 14, with its discharging downward inclined end portion passing through the top of the furnace about in alinement with a grate 4. Within said trough or chute is arranged a spiral or helical conveyer l5, suitably journaled in place and having a pulley fixed to its outer end adapted to be belted to a suitable motor or driver, and thus actuated to feed or convey the fuel through said chute or trough, which is finally delivered into the furnace as required.

Having thus fully described my invention, what I claim as new, and desire to protect by Letters Patent, is

l. In afurnace of the character described, air-blast-condncting passages or pipes, and pipes taking gases from the combustion-chamber and adapted to heat the air-blasts passing through the first-named passages or pipes, said air-blast, and gas, pipes or passages being arranged in the furnace-walls and delivering into the combustionchamber,in a plane passing through said chamber, substantially as set forth.

IOO

2. In a furnace of the character described,

air-pipes comprising upper and lower pipes connecting with an air-supply andconnected together by additional pipes, and gas conduits or passages having ports or openings communicating with the combustion-chamber, and surrounding said air-pipes, andsaid air-pipes and gas-passages deliverinor ata common point or points, and into said comf bustion-chamber, al1 said pipes and passages being arranged in the furnace-wal1s, substantially as set forth.

3. In a furnace of the character described, air-pipes connecting with an air-supply, comprising upper and lower pipes with intermer diate connecting pipes tubular bricks or sleeves incasing said pipes, and gas passages orv conduits surrounding said air passages and having ports or openings communicating with the combustion-chamber, both said air and gas passages delivering their` contents at a common point into said combustion-chamber, all said pipes andV passages being arranged in the furnace-walls, substantially as Vset forth.

air-pipes and said gas conduits or spaces delivering their contents at a common point or points, into the combustion-chamber, substantially as set lforth.

In testimony whereof I affix my signature of two witnesses.

WILLIAM STUBBLEBINE. l Witnesses: v

GEO. L. BAUM,` SEWARD L. FRITCH'MAN.

in presence 

